swatkat: I don't know if you understand the term immersion correctly,
it's not about game's art it's about feeling like your in the game and this can be done even in cartoonish games.
I understand immersion very well, and for me, it can't be done in cartoonish games, because it doesn't feel real. For some it can, that's fine. Not for me. I'm not saying graphics are all that makes immersion, but bad graphics can ruin immersion. At least for me. If not for you, then you and I just look at differently, that doesn't mean I don't understand what immersion means. I understand perfectly well what it means.
OldFatGuy: ...turn the background music off...
Licurg: Why do this ? Isn't the music there to actually help with the immersion ?
Well, yeah, except for me when I'm out adventuring and only hearing the ambient sounds of the world around me, that just feels more real than if I'm hearing background music. But man I did love Morrowind's music. Actually liked that better than Skyrim's, but I thought Skyrim was a much more "alive" world to roam around in. But Morrowind is close, they're both just so cool, I can literally turn those games on and just wander around for a few minutes, and the next thing I know six hours have passed. And for all of those six hours it felt like I was actually in that world. Not all games capture that feeling, it's just IMO Morrowind and Skyrim did it better than any other I've ever played.
ADDED: Oh, and another Bethesda game, Fallout 3 also had a good immersion for me. Actually better than Fallout NV, although I thought the gameplay in Fallout NV was far superior.